/[autoconf]/autoconf/doc/autoconf.texi
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revision 1.775 by kryde, Tue Nov 4 21:16:10 2003 UTC revision 1.776 by kryde, Tue Nov 4 21:18:58 2003 UTC
# Line 3560  case and instead @code{unsetenv} must be Line 3560  case and instead @code{unsetenv} must be
3560  On MINGW, a call @code{putenv("FOO=")} removes @samp{FOO} from the  On MINGW, a call @code{putenv("FOO=")} removes @samp{FOO} from the
3561  environment, rather than inserting it with an empty value.  environment, rather than inserting it with an empty value.
3562    
3563    @item @code{signal} handler
3564    @c @fuindex signal
3565    @prindex @code{signal}
3566    Normally @code{signal} takes a handler function with a return type of
3567    @code{void}, but some old systems required @code{int} instead.  Any
3568    actual @code{int} value returned is not used, this is only a
3569    difference in the function prototype demanded.
3570    
3571    All systems we know of in current use take @code{void}.  Presumably
3572    @code{int} was to support K&R C, where of course @code{void} is not
3573    available.  @code{AC_TYPE_SIGNAL} (@pxref{Particular Types}) can be
3574    used to establish the correct type in all cases.
3575    
3576  @item @code{snprintf}  @item @code{snprintf}
3577  @c @fuindex snprintf  @c @fuindex snprintf
3578  @prindex @code{snprintf}  @prindex @code{snprintf}

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